KCET · BIOLOGY · STD 12 - 4. Principles of Inheritance and Variation

XO type of sex determination and XY type of sex determination are the example of

A male homogamety
B male heterogamety
C female homogamety
D female heterogamety

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Answer & Solution

Correct Answer

(B) male heterogamety

Step-by-step Solution

Detailed explanation

(B) male heterogamety,
In both XO type and XY of sex determination, males produce two different types of gametes. Such typeof sex determination mechanism are example of male heterogamety.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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